用Tomcat和Eclipse开发Servlet程序

1、 安装eclipse
1)、 在官网上直接下载Eclipse IDE for Java EE Developers，解压即可；
2、 eclipse安装tomcat插件：
1)、 在http://www.eclipsetotale.com/tomcatPlugin.html上下载tomcatPluginV33.zip
2)、 解压到eclipse目录下的plugins目录中
3)、 重新启动eclipse
4)、 如果你在Window -> Prefences中找不到Server选择的话，说明你的eclipse版本下错了，要下载Eclipse IDE for Java EE Developers
5)、 在Server一栏中选择Runtime Environment，在右边选择Add，选择好安装路径后download。下载完成后点击finished，看到选择版本的tomcatServer已经建立
6)、 在Window -> Prefences -> Tomcat配置tomcat。Tomcat home 选择刚才下载的目录
7)、 点击start tomcat按钮，可以发现大量打印信息，在浏览器中输入http://localhost:8080，出现tomcat的网页，证明已经安装好了。
3 新建Servlet测试程序
1)、 选择菜单File->New->Project... ，在新建项目向导中选择 Web->Dynamic Web Project,project name为MyFirstDynamicWebProject，一路next，最后选择生成web.xml；
2)、 new 一个class，package com.johnny.test，name为helloworld，super class 为HttpServlet；

3)、 code：

[java] package com.johnny.test;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorld extends HttpServlet implements javax.servlet.Servlet{
/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#HttpServlet()
*/
public HelloWorld() {
super();
}

/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request,
HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.getWriter().write("Hello, world 1112!");
}

/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
}
}

package com.johnny.test;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorld extends HttpServlet implements javax.servlet.Servlet{
/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#HttpServlet()
*/
public HelloWorld() {
super();
}

/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest request,
HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.getWriter().write("Hello, world 1112!");
}

/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request,
HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
web.xml

[html]


HelloWorld
com.johnny.test.HelloWorld


HelloWorld
/helloworld

HelloWorld
com.johnny.test.HelloWorld


HelloWorld
/helloworld



4)、 右键点击HelloWorld.java，选择rus as ：run on server，在浏览器上会显示：Hello, world 1112!
5)、 或者右键点击工程，export MyFirstDynamicWebProject.war，然后放到ubuntu的tomcat的webapps目录下